background bark nature redwood Sequoia texture tree trunk. ridge abstract appearance close-up colors colours dry edge edges gray grey grooves layers lines patterned patterns perspectives ridges rough shape shaped shapes strange surface surfaced surfaces textured textures timber tree-trunk trunk twisted twisting uneven unusual variations varieties wood alone bare branch England grass hill isolated landscape leafless lone one ridge single sky Sussex view Weald winter backgrounds bumps cracks shades of colour smooth strips wallpaper brown tree trunk